Atlantic Meridional Overturning Circulation During the Last Glacial Maximum
Atlantic Meridional Overturning Circulation During the Last Glacial Maximum
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DOI：
10.1126/science.1137127
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发表时间：
2007-04
期刊：
影响因子：
56.9
通讯作者：
J. Lynch‐Stieglitz;J. Adkins;W. Curry;T. Dokken;I. Hall;J. Herguera;J. Hirschi;E. Ivanova;
中科院分区：
文献类型：
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作者：
J. Lynch‐Stieglitz;J. Adkins;W. Curry;T. Dokken;I. Hall;J. Herguera;J. Hirschi;E. Ivanova;
在最后一个冰河时代的高峰期，大西洋深处的环流似乎与今天大不相同。我们回顾的意见，这意味着在末次冰期最大的大西洋纬向翻转流通既不是非常缓慢，也不是一个增强版的现今流通。沉积物中铀衰变产物的分布与大西洋深层沃茨的停留时间一致，只比今天稍长。然而，来自多种水团示踪剂的证据支持深水特性的不同分布，包括密度，这在动力学上与环流有关。
The circulation of the deep Atlantic Ocean during the height of the last ice age appears to have been quite different from today. We review observations implying that Atlantic meridional overturning circulation during the Last Glacial Maximum was neither extremely sluggish nor an enhanced version of present-day circulation. The distribution of the decay products of uranium in sediments is consistent with a residence time for deep waters in the Atlantic only slightly greater than today. However, evidence from multiple water-mass tracers supports a different distribution of deep-water properties, including density, which is dynamically linked to circulation.